<template>
  <div>
    <el-form ref="deptForm" :model="form" :rules="rules" label-width="120px">

      <el-form-item label="部门名称" prop="name">
        <el-input v-model="form.name" style="width:80%" placeholder="1-50个字符" />
      </el-form-item>

      <el-form-item label="部门编码" prop="code">
        <el-input v-model="form.code" style="width:80%" placeholder="1-50个字符" />
      </el-form-item>

      <el-form-item label="部门负责人" prop="manager">
        <el-select v-model="form.manager" style="width:80%" placeholder="请选择">
          <el-option
            v-for="employee in employees"
            :key="employee.id"
            :value="employee.username "
            :label="employee.username "
          />
          <!-- value  绑定的是form.manager中的值 -->
          <!-- lable  用户能看到的内容  -->
        </el-select>
      </el-form-item>

      <el-form-item label="部门介绍" prop="introduce">
        <el-input v-model="form.introduce" style="width:80%" placeholder="1-300个字符" type="textarea" :rows="3" />
      </el-form-item>

      <el-form-item>
        <el-button type="primary" size="small" @click="hSubmit">确定</el-button>
        <el-button size="small" @click="hCancel">取消</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import { getEmployeeSimple } from '@/api/employees'// 获取部门信息
import { addDepartments, getDepartDetail, updateDepartments } from '@/api/departments'// 添加部门

export default {
  props: {
    id: { // 当前正在操作的部门
      type: String,
      required: true
    },

    isEdit: {
      type: Boolean,
      required: true
    },

    originList: { // 接收父组件传来需验证的数据
      type: Array,
      required: true
    }
  },
  data() {
    // 验证部门编码不得重复
    const validCode = (rule, value, callback) => {
    //   console.log(value) // 打印的是编码
      let existCodeList = this.originList.map(item => item.code)
      if (this.isEdit) {
        // 把当前正在编辑的部门编号（this.id）排除在外
        console.log('现在是编辑状态，正在编辑的id是', this.id)
        // 过滤掉当前的部门, map得到部门编号列表
        existCodeList = this.originList.filter(item => item.id !== this.id).map(item => item.code)
      }
      //   console.log('existCodeList', existCodeList)

      existCodeList.includes(value) ? callback(new Error('编码' + value + '已存在')) : callback()
    }

    // 验证部门名称不得重复
    const validName = (rule, value, callback) => {
      let existNameList = this.originList.filter(item => item.pid === this.id).map(item => item.name)
      //   console.log('validName.... , 当前被校验的名字是', value)
      if (this.isEdit) {
        // 1. 找到当前被编辑的元素
        const dept = this.originList.find(item => item.id === this.id)
        // 2. 取出pid(它的父级是谁)
        const pid = dept.pid
        // 3. 过滤： 同一个父级，不包括自己； map： 只要需要名字
        existNameList = this.originList.filter(item => item.pid === pid && item.id !== this.id).map(item => item.name)
      }
      //   console.log('被占用的名字列表', existNameList)
      if (existNameList.includes(value)) {
        callback(new Error('名字' + value + '已经被占用了'))
      } else {
        callback()
      }
    }

    return {
      employees: [],
      form: {
        name: '', // 部门名称
        code: '', // 部门编码
        manager: '', // 部门管理者
        introduce: '' // 部门介绍
      },
      rules: {

        name: [// 验证部门名称
          { required: true, message: '部门名称不能为空', trigger: 'blur' },
          { min: 1, max: 50, message: '部门名称要求1-30个字符', trigger: 'blur' },
          { validator: validName, trigger: 'blur' }
        ],

        code: [// 验证编码
          { required: true, message: '部门编码不能为空', trigger: 'blur' },
          { min: 1, max: 50, message: '部门编码要求1-50个字符', trigger: 'blur' },
          { validator: validCode, trigger: 'blur' }// 自定义验证code
        ],

        manager: [// 验证负责人
          { required: true, message: '部门负责人不能为空', trigger: 'blur' }
        ],

        introduce: [// 验证部门介绍
          { required: true, message: '部门介绍不能为空', trigger: 'blur' },
          { min: 1, max: 300, message: '部门介绍要求1-300个字符', trigger: 'blur' }
        ]
      }
    }
  },

  created() {
    this.loadEmployees()
    this.loadDetail()
  },

  methods: {

    async loadDetail() { // 获取当前部门详情
      if (this.isEdit) {
        const res = await getDepartDetail(this.id)
        // console.log(res)
        this.form = res.data
      }
    },
    async loadEmployees() {
      const res = await getEmployeeSimple()
      //   console.log('员工信息', res)
      this.employees = res.data
    },
    async doAdd() {
      const res = await addDepartments({ ...this.form, pid: this.id })
      console.log(res)// 这里打印的是啥
      this.$emit('update-depart')// 子传父  抛出更新事件
    },
    async doEdit() {
      try {
        await updateDepartments(this.form)
        this.$message({ type: 'success', message: '修改成功' })
        this.$emit('update-depart')// 子传父  抛出更新事件
      } catch (err) {
        this.$message({ type: 'error', message: err })
      }
    },

    hSubmit() { // 确定
    //   if (this.isEdit) {
    //     this.doEdit()
    //   } else {
    //     this.doAdd()
    //   }
      this.$refs.deptForm.validate(valid => {
        if (valid) {
          this.isEdit ? this.doEdit() : this.doAdd()
        }
      })
    },
    hCancel() { // 取消
      this.$emit('close')
    }

  }

}
</script>
